Table 1

Baseline clinical and angiographic data

Medical group,
FFR ⩾ 0.75
(n=24)
Surgical group,
FFR < 0.75
(n=30)
Male18 (75%)26 (87%)
Age (years)60 (9)63 (9)
Risk factors
 Hypertension4 (17%)9 (30%)
 Diabetes8 (33%)6 (20%)
 Raised cholesterol8 (33%)14 (47%)
 Smoking1-150 7 (29%)19 (63%)
 Family history1-150 4 (17%)16 (53%)
Previous PTCA2 (8%)4 (13%)
Previous infarction8 (33%)5 (16%)
CCS class2.8 (1.0)3.4 (0.9)
Stress test performed13 (54%)10 (33%)
 Positive/negative/inconclusive8/1/47/1/2
Ejection fraction (%)55 (8)57 (6)
Additional disease
 One/two vessel disease10/610/13
Duration of follow up (months)28 (15)29 (14)
Angiographic data
 Reference diameter (mm)4.06 (0.67)3.45 (0.59)1-150
 Minimum lumen diameter (mm)2.35 (0.46)1.95 (0.39)1-150
 Diameter stenosis (%)42 (9)43 (10)
Pressure data
 Pa (mm Hg)90 (13)95 (18)
 Pd (mm Hg)81 (10)63 (14)1-150
 Fractional flow reserve0.90 (0.06)0.67 (0.09)1-150
  • Values are n (%) or mean (SD).

  • 1-150 p < 0.05.

  • CCS, Canadian Cardiovascular Society; FFR, fractional flow reserve; Pa, aortic pressure; Pd, mean hyperaemic coronary pressure just distal to the left main coronary artery; PTCA, percutaneous transluminal coronary angioplasty.